I stumbled across a great free service called Lenstag. Some of you will have probably already heard of it. Basically it’s a free service on which you can register your photographic equipment and corresponding serial numbers and you can also upload an image containing your copyright exif data. It’ll alert you if your gear is stolen and it is traced and also if your copyrighted images are found on websites. They have apps for Android and Iphone and you also get access to a personal site dashboard. I think it’s a great initiate, check out their blog https://blog.lenstag.com/ and their website is here https://www.lenstag.com/
Hope it’s of interest.